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Combustion and Emissions Investigation on Low-Speed Two-Stroke Marine Diesel Engine with Low Sulfur Diesel Fuel

. 63(8), 923-933, 2013. 24. Karavalakis G., Hajbabaei M., Durbin T.D., Johnson K.C., Zheng Z.Q., Miller W.J.. The effect of natural gas composition on the regulated emissions, gaseous toxic pollutants, and ultrafine particle number emissions from a refuse hauler vehicle. Energy. 50(1), 280-291, 2013. 25. Fontaras G., Martini G., Manfredi U., Marotta A., Krasenbrink A., Maffioletti F., Terenghi R., Colombo M.. Assessment of on-road emissions of four Euro V diesel and CNG waste collection 2 trucks for supporting air-quality improvement initiatives in the

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An experimental study of interceptor’s effectiveness on hydrodynamic performance of high-speed planing crafts

Automatically Controlled Interceptors , KSRI Report, St.Petersburg, Russia, (2002). 10. Krylov Shipbuilding Research Institute (KSRI).: Evaluation of Effectiveness of Automatically Controlled Interceptors for Decrease of Oscillations of High Speed Catamaran , KSRI Report, St.Petersburg, Russia, (2004). 11. Dawson D., and Blount D.: Trim Control , Professional Boat builder, No. 75, (2002). 12. Karimi M.H.: Hydrodynamic Quality Improvement Techniques For High Speed Planning Crafts , Proceeding of 7th Conference on Marine

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The significance of oxbow lakes for the ecosystem of afforested river valleys

The significance of oxbow lakes for the ecosystem of afforested river valleys

The interest in significance of forest areas in water quality improvement has been increasing since creation of biogeochemical barriers became effective tools against the input of pollutants to surface water from diffuse sources. Along meandering river valleys, numerous floodplain lakes often appear as valuable water ecosystems but of advanced eutrophy. Their trophic status depends not only on the hydrological connectivity with the river but also land use in the direct vicinity of the reservoir. Research on water ecosystems in the postglacial river valleys in northern Poland contributed to identification of the role of woodland area in pollutants migration in the valley of the łyna River.

The study on the ecosystem concerned seasonal variation in nutrient concentrations (N and P) and bottom sediments properties in relation to hydrological conditions (water level fluctuations). Based on the collected data we attempted prediction of the reservoir lifetime. Depending on hydrological, geological and topographic conditions the origin of water supply of the basin is changing. Annual water level fluctuations in the range of 200 cm cause the basin capacity variation as much as 5 times. Nevertheless, water quality in the lake was conditioned by the riverine supply, the significant share in the lake feeding has groundwater supply from hillslope aquifer and seepage through alluvial aquifer. Contribution of every origin supply depends on river flow rate and valley water level, it depends on alluvial ground formations permeability and relief. Hillslope erosion of the concave bank was responsible for high nitrogen and phosphorus outflows. The research showed that primary and secondary production and freshets contributed to intensive deposition of bottom sediments in oxbow lake. The increase rate of sediment determined on the base of matter balance was 10 times higher than deposition rate of bottom sediments in glacial lakes. The accelerated processes of silting-up and shallowing and terrestialization of the valuable ecosystems indicate the necessity of floodpain lakes protection due to ecological functions they play in forestry landscape.

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Runoff velocity behaviour on smooth pavement and paving blocks surfaces measured by a tilted plot

athaway J.M. 2009. Evaluation of various types of permeable pavement with respect to water quality improvement and flood control. In: Low impact development: New and continuing applications. Second National Low Impact Development Conference. March 12–14, 2007. Wilmington, North Carolina, United States p. 275–289. D unkerley D. 2001. Estimating the mean speed of laminar overland flow using dye injection-uncertainty on rough surfaces. Earth Surface Processes and Landforms. Vol. 26. Iss. 4 p. 363–374. D unkerley D.L. 2003. An optical tachometer for shortpath

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